-96.6% is the change from 677 to 23
Calculation steps:
[( 23 - 677 ) ÷ 677] x 100 = -96.6%
Formula
Percentage change = [(23 - 677) / 677] x 100
Subtract the new number by the original number
23 - 677 = -654
-654 ÷ 677 = -0.96602658788774
-0.96602658788774 x 100 = -96.6%